Epson EPL-N2000, Service Manual

Page: 77 / 188

2.1.1.3 Developing Process
Paper goes through this process to convert electrostatic image produced through the charging and
exposure processes into visible image. It is accomplished using toner and 3 bias voltages;
developingt bias, toner bias, and seal bias. Developing bias feeds toner evenly on the sleeve roller.
The amount of toner fed onto the roller is controlled by developing bias, which enables the printer
to adjust printing tones.
Developing bias –300 V (–220 to –330 V)
Toner bias –550 V
Seal bias –249 bias
Toner bias:-500V
PWB-F
High Voltage Unit
Toner Hopper
Seal bias:-249V
PC Drum
Sleeve Roller
Toner Feed Roller
Developing bias:-300V (-220V to -330V )
Figure 2-4. Developing Process
Operating Principles EPL-N2000 Service Manual
2-4 Rev.A